Modification to the Wraith III front brakes concerning the bolts used to attach the brake drum.
| Identifier | ExFiles\Box 7\7\ X 606 Brakes-page064 | |
| Date | 14th June 1937 | |
| SECRET. By. {R.W. Bailey - Chief Engineer} Copy to Dev. Rm. {William Robotham - Chief Engineer} Hives. Hardy 606 E {Mr Elliott - Chief Engineer} /Ev. {Ivan Evernden - coachwork} G/M.14.6.37. WRAITH III. FRONT BRAKES. On N.Sch.5163 we have shown .250 bolts replaced by .312 bolts, six in number, for attaching the brake drum to the hub. We would be glad if you would kindly arrange to effect a similar modification of the front brake drum using six parallel fitting bolts. As it is not intended to remove the brake drum from the hub, the bolts can have a plain washer and a lock nut riveted up. The present bolt retaining ring can be dispensed with. E {Mr Elliott - Chief Engineer} /Ev. {Ivan Evernden - coachwork} | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).